Weighing and bagging machine.



G. T. WADE.

WEIGHING AND BAGGING MACHINE.

APPLIOATION FILED MAlLll, 1909.

Patented N0v.8, 1910. I

2 BHEBTSSHEET 1.

VV/T/VESSES' GEORGE '1. WADE, OF BOCKLAND, MAINE. i

WEIGI-IING AND BAGGING "MACHINE. I

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed March 11, 1909. Serial No. 482,728.

To all whom it may concern:

Be it known that I, Gnonon T. l VADE, a citizen of the United States,residing at Rockland county of Knox, State of Maine, have inventedcertain new and useful Improvements in \Veighing and Bagging Machines,of which the following is a specification.

This invention relates to weighing and bagging machines, andparticularly to machines for thus handling finely divided material, thatherein set forth being shown as adapted for the weighing and bagging ofsuch material as lime. The handling of material of this sort in such anoperation is made difficult by the tendency of the material to pack inthe feeding, and to entrain air in the baggingthereof.

To this end and to the further end of improving the general. means foraccurately weighing and packing, I have devised my present invention inwhichI provide for continuously moving the material in the feedingthereof and of passing it to the containers in such a "ay thatuniformity of flow is secured and that the air be allowed to escape andthe packages filled in compactly with the material.

I have also devised means for checking the delivery and making the cutoff of the flow prompt and capable of delicate adjustment.

These features will be more fully set forth in the specification whichfollows and are illustrated in the drawings which form a part thereof,in which I have shown and described an illustrative device embodying theprinciples and particularly adapted to the handling of hydrated lime.

In these drawings: Figure 1 is a rear elevation of the machine showingthe feed for the material, Fig. 2 is a plan view of the machine, Fig. 3is a side section from the left on line 3-3, Fig. 1, Fig. f, a detail ofscale and latch and valve structure broken away in part, and Fig. 5 is amodification of the release.

1 are uprights supporting a double trough 2 having communicatingpassages 3 between the two parts.

4: are a pair of helicoids geared together at 5 to feed in oppositedirections to secure a circulation of the material through the troughs2.

G are valve casings depending from the troughs 7 and opening thereinthrough passages 7. In each casing 6 is a segmental valve 8 mounted on ashaft 9 to rotate in said casing 6 to cover or uncover the mouth of thepassage 7.

15 is a power pulley for driving the helicoids.

On the supports 1 is carried a platform 10 on which are located scales12, one under each of the hoppers 11. To the upright rods 13 of thesescales are clamped at 14 an extension rod 15 which is connected to onearm 16 of a bell crank 16. The other arm is provided with a toe 16 (seeFig. 4) which supports the end 17 of a lever 18 normally held up by aleaf spring 20.

In the detail in Fig. 5 I have shown a modified form of release. In thisform a laterally movable bolt 16 which is swung from a support 16 andconnected to the upper end of the bell crank supports the rear end 17 ofthe lever arm 18 during the filling. The bolt thus swung withdraws in asubstantially horizontal line thus making the release with the leastpossible friction. The lever 18 is pivoted at 21 and provided with avertical catch..22. The catch 22 has a notch 23 and a beveled end 24.The shafts 9 on which the valves 8 are mounted are provided at theirforward ends with levers 25.

In order to provide for the adjustment of the valvesso that they may beset to open a greater or less amount, an adjustable connection is madeby means of set screws 9 which connect their rear ends with curvedspring arms 26 having a turned in end 2'? adapted to engage the notch 23of the catch 22.

28 are springs coiled on the shaft 9 and tending to rotate the shafts toclose the valves 8.

The operation of the device is as follows: The troughs 11 may be filledby any desirable manner as by a chute indicated in Fig. 1 at 29.Material .will then be circulated back and forth through the paralleltroughs by the helicoids 1-. As the material passes over the casin s 6it will drop into the same through the passages 7, being mixed andloosened by the blades of the helicoids 4 as they rotate. The valves 8normally stand closed and are held in that position by the coiledsprings 28. If a bag be hung on the support under the delivery mouth ofthe casing 6 and the hand lever 25 depressed, the valve 8 will be openedand the flow started. \Vhen the predetermined weight of lime has beendelivered to the bag the scale arm 13 upon which the counter-weight hasbeen adjusted to regulate it to said predetermined weight will be raisedand the connecting rods 13 lying beyond the point of fulcrum of thelever arms will descend. This causes, through the rod 15, the rocking ofthe bell crank 16 and the consequent release of the arm 18 which isdepressed by the upward pull of the bent arm 26 on which the spring 28is acting.

By the arrangement herein set forth the attendant has only toremove thefull bags and replace them with those to be filled and, as the severalhoppers may be arranged to act successively, a single attendant mayeasily run the machine and do so without the necessity of breathing thelime dust which is thrown off whenever it has been necessary to overcomethe packing of the lime or the settling of the same in the bags by hand.

Various modifications in the locking latch, in the transmittingmechanism, in the arrangement of the feed, and in other parts of thedevice may obviously be made without departing from the spirit of myinvention.

\Vhile the bag is shown loosely attached to the mouth of the hopper itis to be understood that the bag may be supported by any sort of aholder, that shown in my former application, Ser. No. 376,989, beingWell adapted for this purpose.

What I therefore claim and desire to secure by Letters Patent is 1. In adevice of the class described, a supply bin having a closed circuit anda plurality of discharge openings along the same and means forpositively circulating the material therein through said circuit.

2-. In a device of the class described, a supply bin, continuouslycommunicating troughs therein and having a plurality of dischargeopenings and means for positively circulating material through saidtroughs.

8. In a device for filling receptacles, a pair of parallel troughshaving communieating ends, and oppositely acting helicoids therein forpositively circulating the mate rial theret-hrough.

4. In a device for filling receptacles, a supply bin, means forpositively circulating the material therein, a plurality of deliverychutes in the line of said circulation, and means for closing saidchutes upon the dclivery therefrom of a predetermined weight ofmaterial.

In a device for filling receptacles, a supply bin, means for positivelycirculating the material therein, a plurality of delivery chutes in theline of said circulation, a scale at each chute, a valve in each chuteand an operative connection between said scales and valve for closingthe latter upon the operation of the scales.

(3. In a device I01 filling receptacles, a source of supply, a deliveryopening therefrom, a cut-oil, means tending normally to hold said cutofi shut, a catch pivoted between its ends, means on one end of saidpivoted catch to hold said means open, a swinging link, a laterallymoving stop supported thereon for engagementwith the other end of saidcatch and a pivoted arm for operating said stop.

In testimony whereof, I afiix my signature in presence of two witnesses.

GEORGE T. WADE.

W1tnesses FREDERICK J I'IALL, FRANK I-I. INGRAI-IAM.

